import * as React from 'react';
import { Sidebar } from './components/Sidebar';
import { PageBuilder } from './components/PageBuilder';
import AIAssistant from './components/AIAssistant';
import PageAnalytics from './components/PageAnalytics';
import InteractionAnalytics from './components/InteractionAnalytics';
import ShortLinks from './components/ShortLinks';
import EnterpriseHosting from './components/EnterpriseHosting';
import SEOServices from './components/SEOServices';
import VideoCreator from './components/VideoCreator';
import NewsCreator from './components/NewsCreator';
import { ContentScheduler } from './components/ContentScheduler';
import { CRM } from './components/CRM';
import { GreenPage, AIGCSettings, FormSubmission } from './types';
import { createNewPage } from './services/mockDataService';
import PageManagementModal from './components/PageManagementModal';
import ShareModal from './components/ShareModal';
import Showcase from './components/Showcase';
import Auth from './components/Auth';
import { authService } from './services/authService';
import { LanguageProvider, useTranslation } from './hooks/useI18n';

const MainApp = () => {
    const { t } = useTranslation();
    const [currentUser, setCurrentUser] = React.useState<string | null>(() => authService.getCurrentUser());
    const [pages, setPages] = React.useState<GreenPage[]>([]);
    const [activePageId, setActivePageId] = React.useState<string | null>(null);
    const [activeNavKey, setActiveNavKey] = React.useState('Page.Link');
    const [isPageManagerOpen, setIsPageManagerOpen] = React.useState(false);
    const [isShareModalOpen, setIsShareModalOpen] = React.useState(false);
    const [theme, setTheme] = React.useState<'light' | 'dark'>('dark');
    
    // Load user pages on login/app load, and handle multi-tab logout
    React.useEffect(() => {
        const loadUserData = () => {
            const user = authService.getCurrentUser();
            if (user) {
                if (user !== currentUser) {
                    setCurrentUser(user);
                }
                const userPages = authService.getUserPages();
                if (userPages) {
                    setPages(userPages);
                    if (userPages.length > 0) {
                        // Ensure activePageId is valid, otherwise default to the first page
                        const currentActive = userPages.find(p => p.id === activePageId);
                        if (!currentActive) {
                            setActivePageId(userPages[0].id);
                        }
                    } else {
                        setActivePageId(null);
                    }
                }
            } else {
                setCurrentUser(null);
                setPages([]);
                setActivePageId(null);
            }
        };

        loadUserData();

        // Listen for storage changes to handle login/logout from other tabs
        window.addEventListener('storage', loadUserData);
        return () => {
            window.removeEventListener('storage', loadUserData);
        };
    }, [currentUser, activePageId]);

    // Save pages whenever they change
    React.useEffect(() => {
        if (currentUser && pages.length > 0) {
            authService.saveUserPages(pages);
        }
    }, [pages, currentUser]);


    React.useEffect(() => {
        if (theme === 'dark') {
            document.documentElement.classList.add('dark');
        } else {
            document.documentElement.classList.remove('dark');
        }
    }, [theme]);

    const activePage = React.useMemo(() => pages.find(p => p.id === activePageId), [pages, activePageId]);
    
    const handleAuthSuccess = () => {
        const user = authService.getCurrentUser();
        setCurrentUser(user);
    };

    const handleLogout = () => {
        authService.logout();
        setCurrentUser(null);
    };

    const handleUpdateActivePage = (updates: Partial<GreenPage>) => {
        setPages(currentPages => 
            currentPages.map(page =>
                page.id === activePageId ? { ...page, ...updates } : page
            )
        );
    };
    
    const handleUpdatePage = (id: string, newName: string) => {
        setPages(currentPages =>
            currentPages.map(page =>
                page.id === id ? { ...page, name: newName, slug: newName.toLowerCase().replace(/\s+/g, '-') } : page
            )
        );
    };

    const handleCreatePage = (name: string) => {
        if (!name.trim()) return;
        const newPage = createNewPage(name);
        setPages(prev => [...prev, newPage]);
        setActivePageId(newPage.id);
        setActiveNavKey('Page.Link');
        setIsPageManagerOpen(false);
    };

    const handleImportShowcasePage = (pageData: GreenPage) => {
        // This is a deep copy to prevent state mutation issues
        const newPage: GreenPage = JSON.parse(JSON.stringify(pageData));

        // Make it unique for the user's list
        newPage.id = `page_${Date.now()}_${Math.random()}`;
        newPage.name = `${pageData.name} (Copy)`;
        newPage.slug = `${pageData.slug}-copy-${Math.floor(Math.random() * 1000)}`;

        setPages(prev => [...prev, newPage]);
        setActivePageId(newPage.id);
        setActiveNavKey('Page.Link'); // Switch to the page builder
        alert(t('app.import_success', { name: pageData.name }));
    };

    const handleVideosGenerated = (newVideos: any[]) => {
        if (!activePage) return;
        const updatedAIGCSettings = {
            ...activePage.aigcSettings,
            videos: [...activePage.aigcSettings.videos, ...newVideos]
        };
        handleUpdateActivePage({ aigcSettings: updatedAIGCSettings });
        alert(t('app.videos_generated_success', { count: newVideos.length }));
        setActiveNavKey('AIGC.Scheduler');
    };

    const handleScheduleUpdate = (newSchedule: any[]) => {
        if (!activePage) return;
        const updatedAIGCSettings = { ...activePage.aigcSettings, schedule: newSchedule };
        handleUpdateActivePage({ aigcSettings: updatedAIGCSettings });
    };

    const handleUpdateAIGCSettings = (newSettings: AIGCSettings) => {
        handleUpdateActivePage({ aigcSettings: newSettings });
    };

    const handleFormSubmission = (submission: FormSubmission) => {
        if (!activePage) return;
        const updatedAnalyticsData = {
            ...activePage.analyticsData,
            formSubmissions: [...(activePage.analyticsData.formSubmissions || []), submission]
        };
        handleUpdateActivePage({ analyticsData: updatedAnalyticsData });
        alert(t('app.form_submission_success'));
    };

    const renderContent = () => {
        if (activeNavKey.startsWith('Showcase.')) {
            const tab = (activeNavKey.split('.')[1] || 'Personal').toLowerCase();
            return <Showcase initialTab={tab as any} onImportPage={handleImportShowcasePage} />;
        }
        
        if (!activePage) {
            return (
                <div className="p-8 text-center text-gray-500 dark:text-gray-400 flex flex-col items-center justify-center h-full">
                    <h2 className="text-2xl font-bold mb-2 text-gray-800 dark:text-gray-200">{t('app.welcome')}</h2>
                    <p className="mb-6">{t('app.no_pages_prompt')}</p>
                    <button onClick={() => setIsPageManagerOpen(true)} className="bg-brand-primary text-white font-bold py-2 px-5 rounded-md hover:bg-brand-secondary transition-colors">
                        {t('app.create_first_page')}
                    </button>
                </div>
            );
        }

        if (activeNavKey.startsWith('Page.')) {
            const tab = (activeNavKey.split('.')[1] || '').toLowerCase();
            return <PageBuilder
                key={activePage.id}
                pageSettings={activePage.pageSettings}
                onUpdate={(newSettings) => handleUpdateActivePage({ pageSettings: newSettings })}
                aigcVideos={activePage.aigcSettings.videos}
                aigcArticles={activePage.aigcSettings.articles}
                initialTab={tab as any || 'link'}
                onOpenShareModal={() => setIsShareModalOpen(true)}
                onFormSubmit={handleFormSubmission}
            />
        }
        
        if (activeNavKey.startsWith('AI Assistant.')) {
            const tab = (activeNavKey.split('.')[1] || 'Persona').toLowerCase();
            return <AIAssistant
                key={activePage.id}
                aiAssistantSettings={activePage.aiAssistantSettings}
                onUpdateSettings={(newSettings) => handleUpdateActivePage({ aiAssistantSettings: newSettings })}
                initialTab={tab as any}
            />
        }

        if (activeNavKey.startsWith('SEO.')) {
            const tab = (activeNavKey.split('.')[1] || 'ShortLinks');
            switch (tab) {
                case 'ShortLinks':
                    return <ShortLinks
                        key={activePage.id}
                        slug={activePage.slug}
                        onUpdateSlug={(slug) => handleUpdateActivePage({ slug })}
                    />
                case 'Hosting':
                    return <EnterpriseHosting key={activePage.id} />
                case 'Services':
                    return <SEOServices key={activePage.id} />
                default:
                    return <ShortLinks key={activePage.id} slug={activePage.slug} onUpdateSlug={(slug) => handleUpdateActivePage({ slug })}/>
            }
        }

        switch (activeNavKey) {
            case 'Analytics.Page':
                return <PageAnalytics key={activePage.id} analyticsData={activePage.analyticsData} />
            case 'Analytics.Interactions':
                return <InteractionAnalytics
                    key={activePage.id}
                    analyticsData={activePage.analyticsData}
                    onUpdateConversations={(conversations) => handleUpdateActivePage({ analyticsData: { ...activePage.analyticsData, conversations } })}
                />
            case 'Analytics.CRM':
                return <CRM key={activePage.id} analyticsData={activePage.analyticsData} />
            case 'AIGC.Creator':
                 return <VideoCreator
                    key={activePage.id}
                    aigcSettings={activePage.aigcSettings}
                    onUpdateAIGCSettings={handleUpdateAIGCSettings}
                    onVideosGenerated={handleVideosGenerated}
                />
            case 'AIGC.News':
                return <NewsCreator
                    key={activePage.id}
                    aigcSettings={activePage.aigcSettings}
                    onUpdateAIGCSettings={handleUpdateAIGCSettings}
                />
            case 'AIGC.Scheduler':
                return <ContentScheduler
                    key={activePage.id}
                    videos={activePage.aigcSettings.videos}
                    schedule={activePage.aigcSettings.schedule}
                    onScheduleUpdate={handleScheduleUpdate}
                />
            default:
                return <PageBuilder
                    key={activePage.id}
                    pageSettings={activePage.pageSettings}
                    onUpdate={(newSettings) => handleUpdateActivePage({ pageSettings: newSettings })}
                    aigcVideos={activePage.aigcSettings.videos}
                    aigcArticles={activePage.aigcSettings.articles}
                    initialTab="link"
                    onOpenShareModal={() => setIsShareModalOpen(true)}
                    onFormSubmit={handleFormSubmission}
                />
        }
    };

    if (!currentUser) {
        return <Auth onAuthSuccess={handleAuthSuccess} />;
    }

    return (
        <div className="flex h-screen bg-gray-100 dark:bg-gray-900 text-gray-900 dark:text-gray-100">
            <Sidebar
                activePageName={activePage ? activePage.name : t('app.no_page_selected')}
                activePageThemeColor={activePage ? activePage.themeColor : 'from-gray-500 to-gray-700'}
                onOpenPageManager={() => setIsPageManagerOpen(true)}
                activeNavKey={activeNavKey}
                setActiveNavKey={setActiveNavKey}
                theme={theme}
                setTheme={setTheme}
                currentUser={currentUser}
                onLogout={handleLogout}
            />
            <main className="flex-1 overflow-y-auto">
                {renderContent()}
            </main>
            {isPageManagerOpen && (
                <PageManagementModal
                    pages={pages}
                    activePageId={activePageId || ''}
                    onSelectPage={(id) => {
                        setActivePageId(id);
                        setIsPageManagerOpen(false);
                    }}
                    onCreatePage={handleCreatePage}
                    onUpdatePage={handleUpdatePage}
                    onClose={() => setIsPageManagerOpen(false)}
                />
            )}
            {isShareModalOpen && activePage && (
                <ShareModal
                    pageSlug={activePage.slug}
                    onClose={() => setIsShareModalOpen(false)}
                />
            )}
        </div>
    );
};

const App = () => {
    return (
        <LanguageProvider>
            <MainApp />
        </LanguageProvider>
    );
};


export default App;